Stop mechanism.



No. 748,103. PATENTED DEG.29,1903.'

- T. F. ROBINSON, 0. E. SMETHURST & W. M. GILBERT.-

STOP MECHANISM.

-APPLIUATION FILED SEPT. 19. 1902.

No MODEL. 5 SHEETS-SHEET 1.-

* k WITNESSES. V MENTOR? @J W g) G "XM Wm WM M W @1614 W I x No. 748,103, PATENTED DEC. 29, 1903. T. F. ROBINSON, 0. E. SMETHURST &W. M. GILBERT.

STOP MECHANISM. APPLICATION FILED SEPT. 19; 1902.

5 SHEBTS-SHEET 2.

N0 MODEL.

HLllI I NVENTO RS;

WITNESSES;

, STOP MECHANISM.

APPLICATION FILED SEPT. 19.1902.

PATENTED DEC. 29, 1903.

T. ROBINSON, G. E. SMETHURST & W. M. GILBERT.

5 SHEETS-SHEET s.

a \"k U NI Q INVENTORS. 6M5 5 wmy No. 748,103. I PATENTED DEC. 29, 1903.

T. F. ROBINSON, C. E. SMETHURST 8; W. M. GILBERT.

STOP MECHANISM.

I APPLIUATION FILED SEPT. 19. 1902. NO MODEL. 5 SHEETSSHEET 4.

WITNESSES. INVENTORIS.

. gj/W M; ZW

, 6% 5 W zzf'l PATENTED DEC. 29, 1903.

T. F. ROBINSON, G. B. SMETHURST & W. M- GILBERT! STOP MECHANISM. APPLIUATION FILED SEPT. 19. 1902.

5 sums-sum 5Q no MODEL.

I NVENTQRS.

. WITNESSES.

No. 748,103. Patented December 29, 1903. UN l-TED STATES PATENT OFFICE.

THOMAS FLETCHER ROBINSON, CHARLES E. SMETHURST, AND WALLACE M.

GILBERT, OF SALFORD, ENGLAND; SAID SMETHURST AND GILBERT AS- SIGNORS TO SAID ROBINSON.

STOP MECHANISM.

SPECIFICATION formingpart of Letters Patent No. 748,103, dated December 29, 1903.

Application filed September 19 1902. Serial No. 124,040. (No model.)

T0 CLZZ whom it y @Wwerm On the central shaft A is fitted so as to ro- Be it known that we, THOMAS FLETCHER tate with it a disk B, with a notch bin its pe- ROBINsON, CHARLES EDWIN SMETHURST, and riphery, and engaging with the disk B is a WALLACE MARCUS GILBERT, British subpivoted dividing or locking lever C, with a 5 jects, and residents of Salford, in the county tooth or projection c, which enters the notch of Lancaster, England, have invented certain I) in the periphery of the disk B. This disk B new and useful Improvements in Stop Mechmay be keyed to the shaft A, asiu Fig. 4:, or it anism, of which the following is a specificamay be bolted to a sleeve B, keyed or pinned tion. to the shaft A, a'sin Fig. 5, or the disk B may 6o [0 This invention relates to improvements in be secured to the shaft A, so as to rotate with dividing mechanism applicable for gear-cutit, in any other practical manner. The dividting machines, milling-machines, and other ingorlooking lever C is pivoted upon a stud machines wherein it is desired to give a shaft 0 mounted in the frame D, and is operated a revolution at intervals and then look it or or held in contact withthe disk B and in the 15 hold it immovable until the completion of notch b by a strong spring a acting against the cutting or other operation. its lower member 0.

It consists, essentially, in applying to the The dividing and locking lever C is drawn shaft to be operated or rotated a notched disk back out ofthe notch b by a releasing-pawl keyed or otherwise attached thereto, a divid- E, also pivoted upon the stud o each time 2o ing lever or finger pivoted to a fixed stud the cutting-tool of the machine to which it is which engages with the notch in the disk and applied has completed its out or traverse. locks it in position, a releasing-lever for with- On the shaft A there is also fitted a clutch drawingthe locking-lever, anda clutch on the of two members F F, the driving clutch shaft by which the shaft is rotated when remember F being loose on the shaft and driven z 5 leased. by a train of gear-wheelsf so as to constantly The invention will be fully described with revolve and the driven clutch member F reference to the accompanying drawings. keyed or spliced to rotat-e'with the shaft A Figure 1 isan end elevation; Fig. 2, a secand slide longitudinally upon it to engage or tional elevation on the broken line, Fig. 4c; disengage with the revolving or driving mem- 8o 30 Fig. 3, aside elevation; Fig. 4, a longitudinal ber of the clutch. The driven clutch memsection, (view from the opposite side to Fig. ber F of the clutch is moved into contact 3;) Fig. 5, a longitudinal section showinga with the loose driving member F by the modified arrangement of securing the disk B spring f and out of contact by the forked leto the shaft; Fig. 6, a plan; Fig. 7, an end elever G. 5 vation showing a modified arrangement for The forked clutch-lever G is pivoted upon operating or withdrawing the dividing or the stud g and is fitted with a second lever or looking lever C from the disk B. arm G, and the sliding clutch member F is The shaft A, towhich it is desired to give fitted with a cam g, which at each revoluan exact complete revolution atintervals and tion of the clutch member F and shaft Aeno 40 then hold itimmovablylocked during the cutgages the arm G and actuates the forked leting operation on the work, is connected by ver G, throwing the driven member F of the a gear-wheel placed at one end (or in other clutch out of gear with thedriving member F. convenient position) and byasecondary shaft The forked clutch-lever G is locked or held with the work-holder of the cutting-machine, so as to prevent the movement of the clutch 5 and from it the Work, such as atoothed wheel, member F into gear, except when it is reis rotated such part of a revolution as may quired to operate the shaft A, bya short lever be required after each cut or traverse of the 9 connected therewith, which rests against cutting or operative part of the machine. As the projection or finger on the base of the such do not form any part of the invention dividing and locking lever C. mo 50 and may be of any known construction, they The releasing-pawl E is drawn back periare not illustrated in the drawings. odically each time the cutting-tool of the ma chine has completed its return traverse. It is connected to the slide bya connecting-rod H and link or lever h, fixed to a spindle h. The slide or other moving part of the machine (not shown in the drawings) rocks the spindle h, and with it the lever h, forcing down the rocking lever K, to which the releasing-lever is pivoted on a stud It. On the side of the releasing-lever E is formed a projection e, and to the frame is fitted a fixed stud e. As the pawl E is drawn back the projection e slides over the stud 6, raising it and causing it to disengage from the locking or dividing lever O, letting the latter drop back onto the periphery of the notched disk B.

Instead of the connecting-rod H the rocking lever K may be drawn back by a. chain H and moved forward again by a spring H as in Fig. 7.

The operation of the automatic clutch dividing mechanism is as follows: The dividing or notched disk B being held or locked by the dividing-lever O engaging in the notch 12, the rocking lever K is oscillated back by the connecting-rod H or chain H, and the releasing-lever E is drawn back thereby. The dividing-lever O is pulled out of the notch b in the disk 13, and the finger or stop 0 attached thereto, is moved clear of the second lever g on the forked clutch-lever G, thereby permitting the springf to force the driven part F of the clutch into gear with the driving part F, causing the shaft A and the dividing-disk to rotate. The further movement of the rocking lever K and releasinglever E causes the latter to ride up the stud e and release the dividing or looking lever O, which drops back onto the periphery of the dividing-disk B. When the shaftA has made one complete revolution, the cam g on the sliding clutch F meets the lever G, rotating the spindle g and oscillating the forked lever G, thereby forcing the two parts F F of the clutch out of gear. The dividing-disk B is so adjusted on the shaft A in relation to the cam g on the clutch F that immediately the cam has thrown the clutches out of gear the dividing-lever 0 drops into the notch 17 in the disk B and locks the shaft A in position until the dividing-lever is again drawn back. At the same time the lover or finger 0 drops in front of the second lever g on the forked lever G and holds the clutch F out of contact with the clutch part F --until the driving or locking lever O is again raised.

What we claim as our invention, and desire to secure by Letters Patent, is

1. In dividing mechanism for gear-cutting, milling and other machines, the combination with a shaft A, of a notched disk fixed to the shaft, a clutch with driving member loose on the shaft and driven member sliding over a key thereon, a pivoted dividing-lever engaging the notch in the disk to lock it during the operation of cutting, means for withdrawing the lever and means for rotating the driving clutch member.

2. In dividing mechanism for gear-cutting, milling and other machines, the combination with the shaft to be rotated and a clutch on the shaft, one member loose and the other splined thereto, and means for driving the loose clutch, of a notched disk made fast to the shaft, a dividing-lever engaging the notch in the disk to lock it, and means for withdrawing the lever, substantially as-described.

3. In dividing mechanism for gear-cutting, milling and other machines the combination with the frame of the machine and the shaft to be rotated of a clutch with driving member F loose on the shaft, means for driving the same, a sliding member F, splined on the shaft, means for moving it to and fro, a notched disk B attached to the shaft provided with notch b in its periphery, a dividing-pawl O pivoted to the frame to lock the notched disk after each revolution, a releasing-pawl E pivoted to the rocking lever to withdraw the lever O, a rocking lever K pivoted to the frame and actuating-rod H connected to the rocking lever to operate the releasing-pawl E substantially as described.

4. In dividing mechanismfor gear-cutting, milling and other machines, the combination with the shaft to be rotated of a clutch with driving member F loose on the shaft, means for driving same, a driven member F splined to the shaft, a spring to force the clutch members into gear, a forked lever G with arm G, to throw the clutch members out of gear, a cam g on the clutch-boss to operate the forked lever G at the completion of a revolution of the shaft A, substantially asdescribed.

5. In dividing mechanism for gear-cutting,

milling and other machines the combination with the shaft A to be rotated periodically, the driving clutch member F loose thereon and the driven clutch member F sliding over a key on the shaft of the notched disk B provided with a notch b in its periphery attached to the shaft, a locking-lever O pivoted to the frame engaging therewith, means for withdrawing the lever after each operation of the machine, a spring to force the clutch members F F into contact, a forked lever G to disengage them, an arm G attached to the forked lever, a cam g on the boss of the clutch to engagethe arm G and operate the forked lever G at each revolution of the shaft, there being a projection attached to the forked lever and a finger 0 attached to the locking-lever to hold the clutch member out of engagement, during the operation of the cutting-machine, substantially as described. In witness whereof we have hereunto signed our names, in the presence of two subscribing witnesses, this 29th day of July, 1902.

,T. FLETCHER ROBINSON.

CHAS. -E. SMETHURST. WALLACE M. GILBERT.

Witnesses:

J. OWDEN OBRIEN, B. TATHAM WOODHEAD.

ICC 

